The difference in how the IN bill read is that being an out-of-state resident for tuition purposes means you can't establish residency for purposes of voting. Meaning you could change your DL, buy a home, file taxes, get a job, etc. but until you've maintained your residency for 1 year, you couldn't register to vote.
Register at School or Home?
Registering to vote at a school residence: Students can establish residency in Tennessee and register to vote there if they have a present intention to remain at their Tennessee school address and they do not intend to return to their prior residence after finishing college. Students who declare their school address as a legal residence are eligible to vote even if they are classified as “out of state” by their college or university. Out-of-state students who qualify as registered voters in Tennessee are residents for the purposes of driver’s license laws. Drivers will be required to get a Tennessee driver’s license within 30 days of establishing residency.